Opinion: It's time to clean the germs out of our indoor air
“Over four years later, things are changing. The WHO now finally and fully recognizes COVID-19 is airborne at the institutional level, and has made one of the world’s top aerosol scientists co-chair of their new indoor air advisory group. The WHO also collaborated with particle physicists to develop ARIA, the Airborne Risk Indoor Assessment tool, which models risk of infection for different types of buildings and settings to help us understand how to make indoor air clean.”